{"record":{"id":"a8afa5af7e822241","repo":"bevyengine/bevy","slug":"asset-source-0-does-not-have-an-assetwriter","errorCode":null,"errorMessage":"Asset Source '{0}' does not have an AssetWriter.","messagePattern":"Asset Source '(.+?)' does not have an AssetWriter\\.","errorType":"exception","errorClass":"MissingAssetWriterError","httpStatus":null,"severity":"error","filePath":"crates/bevy_asset/src/io/source.rs","lineNumber":657,"sourceCode":"    }\n\n    /// This will cause processed [`AssetReader`](crate::io::AssetReader) futures (such as [`AssetReader::read`](crate::io::AssetReader::read)) to wait until\n    /// the [`AssetProcessor`](crate::AssetProcessor) has finished processing the requested asset.\n    pub(crate) fn gate_on_processor(&mut self, processing_state: Arc<ProcessingState>) {\n        for source in self.iter_processed_mut() {\n            source.gate_on_processor(processing_state.clone());\n        }\n    }\n}\n\n/// An error returned when an [`AssetSource`] does not exist for a given id.\n#[derive(Error, Debug, Clone, PartialEq, Eq)]\n#[error(\"Asset Source '{0}' does not exist\")]\npub struct MissingAssetSourceError(AssetSourceId<'static>);\n\n/// An error returned when an [`AssetWriter`](crate::io::AssetWriter) does not exist for a given id.\n#[derive(Error, Debug, Clone)]\n#[error(\"Asset Source '{0}' does not have an AssetWriter.\")]\npub struct MissingAssetWriterError(AssetSourceId<'static>);\n\n/// An error returned when a processed [`AssetReader`](crate::io::AssetReader) does not exist for a given id.\n#[derive(Error, Debug, Clone, PartialEq, Eq)]\n#[error(\"Asset Source '{0}' does not have a processed AssetReader.\")]\npub struct MissingProcessedAssetReaderError(AssetSourceId<'static>);\n\n/// An error returned when a processed [`AssetWriter`](crate::io::AssetWriter) does not exist for a given id.\n#[derive(Error, Debug, Clone)]\n#[error(\"Asset Source '{0}' does not have a processed AssetWriter.\")]\npub struct MissingProcessedAssetWriterError(AssetSourceId<'static>);\n\nconst MISSING_DEFAULT_SOURCE: &str =\n    \"A default AssetSource is required. Add one to `AssetSourceBuilders`\";\n","sourceCodeStart":639,"sourceCodeEnd":672,"githubUrl":"https://github.com/bevyengine/bevy/blob/396ca727080776bd313bb892423b7d94e03b81b4/crates/bevy_asset/src/io/source.rs#L639-L672","documentation":"MissingAssetWriterError: a writer was requested for an asset source id that exists but has no AssetWriter configured (e.g. a read-only source, or writer omitted when building the source). Writing/importing to that source is impossible.","triggerScenarios":"Thrown at crates/bevy_asset/src/io/source.rs:657 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Provide a writer (with_writer / processed_writer) when building the asset source","Only read from sources that are intentionally read-only","Verify you are targeting the intended source id with the write operation"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"396ca727080776bd313bb892423b7d94e03b81b4","analyzedAt":"2026-08-20T16:12:39.808Z","contentChangedAt":"2026-08-20T16:12:39.808Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}